In Star Wars 'Legends', the galactic standard year spans 368 days, which is divided between 10 months, 3 festival weeks, and 3 holidays. Each month is comprised of seven weeks; each week is comprised of five days apiece.
When I started working on my Star Wars quest, I decided that each 'turn' would cover roughly two months. For convenience, I divided the year into five 'quintiles'. These calendars were prepared and produced by me for that quest, which found here:
https://forums.sufficientvelocity.com/threads/gray-paladin-a-star-wars-ckii-quest.39824/
The days of the week and festivals are named in canon sources; the names of the months are original. The in-universe history behind each of those names can be found here:
https://forums.sufficientvelocity.com/posts/9451478/